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CVE-2026-49993

@nuxt/webpack-builder and @nuxt/rspack-builder dev server same-origin check bypassed when Sec-Fetch-Site, Origin, and Referer are all absent (incomplete fix for GHSA-6m52-m754-pw2g)

Published: Jun 12, 2026Updated: Jun 15, 2026 Sources: CVE List NVDCWE-749
NVD MITRE
5.7CVSSMEDIUM
EPSS Score
0.2%
Top 90.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Nuxt is an open-source web development framework for Vue.js. In @nuxt/rspack-builder and @nuxt/webpack-builder from versions 3.15.4 to before 3.21.7 and 4.0.0 to before 4.4.7, there is an incomplete fix for GHSA-6m52-m754-pw2g. Source code may still be stolen during dev when using the webpack / rspack builder if the dev server is bound to a non-loopback address (e.g. nuxt dev --host) and the developer opens a malicious site on the same network. This issue has been patched in versions 3.21.7 and 4.4.7.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:RS:UC:HI:NA:N
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-749

Affected Products

nuxtnuxt
Library
OSS Libraries / web-framework
nuxt\/rspack-buildernuxt
Library
OSS Libraries / web-framework
nuxt\/webpack-buildernuxt
Library
OSS Libraries / web-framework
nuxtoss-projectOSS Librariesaka nuxt.js, nuxt/framework

Exploitability

Official Patch Available
Workaround Available

References

https://github.com/nuxt/nuxt/security/advisories/GHSA-x6qj-4h56-5rj5
github.com
https://github.com/nuxt/nuxt/security/advisories/GHSA-6m52-m754-pw2g
github.com
https://github.com/nuxt/nuxt/pull/35200
github.com
and 2 more references View all →

Timeline

Published
Jun 12, 2026
Last Updated
Jun 15, 2026

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